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Aiming headlights after changing bulb? #5336352 01/30/20 12:10 PM
Joined: Apr 2013
Posts: 2,882
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mclasser Offline OP
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Joined: Apr 2013
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I replaced one burnt out Philips 9012 bulb with another Philips 9012. Driving around, I noticed it was pointing higher and creating glare off street signs. I parked against a flat wall and the new bulb was indeed aimed higher, causing a scattered pattern. I made sure it was seated correctly and aimed it down to match the other side. With the old bulbs, the aim was perfect.

I've never had to re-aim after changing a bulb before. Have you guys encountered such a thing?


2018 Hyundai Elantra VE
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2002 Honda Accord EX-L

Re: Aiming headlights after changing bulb? [Re: mclasser] #5336358 01/30/20 12:15 PM
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Chris Meutsch Offline
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If it changed after you changed it, it sounds like an install issue. I've never had this.


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Re: Aiming headlights after changing bulb? [Re: Chris Meutsch] #5336361 01/30/20 12:18 PM
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daman Offline
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Originally Posted by Chris Meutsch
If it changed after you changed it, it sounds like an install issue. I've never had this.

x2


"Always"....Mobil 1

Current fill: AFE 0w30
Re: Aiming headlights after changing bulb? [Re: mclasser] #5336404 01/30/20 01:25 PM
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hallstevenson Offline
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The way modern bulbs lock into their sockets, there's next to no movement in the socket possible. You had to have moved the entire assembly in the process (by accident).

Re: Aiming headlights after changing bulb? [Re: mclasser] #5336445 01/30/20 02:29 PM
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JeffKeryk Offline
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Yeah, make sure it is sitting flush in the headlamp.
If so, Youtube has some videos on headlight alignment.

Good luck.


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Re: Aiming headlights after changing bulb? [Re: mclasser] #5336466 01/30/20 03:10 PM
Joined: Apr 2018
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Imp4 Offline
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Make sure it's installed correctly.
Or maybe you got a bulb with a manufacturing defect.

Eliminate these easy checks before you start to try to turn those rusty aiming screws.

Good luck! cheers


2001 Mitsubishi Galant 2.4 - 165k+
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Re: Aiming headlights after changing bulb? [Re: Imp4] #5336555 01/30/20 05:02 PM
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barryh Offline
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Yes I've experienced a small but noticeable alignment change after replacing a bulb. In my case the beam was pulled to the near side. Checked several times that it was correctly seated and tried the bulb on the other side but the change persisted, I suspect a seating issue would produce a much bigger change in beam alignment. I should have returned it as faulty but it could just as easily have been the original bulb that was faulty. The filament must have to be positioned to very fine tolerances.


Barry

1979 BMW R45 (Triple QX 5W40)
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Re: Aiming headlights after changing bulb? [Re: mclasser] #5336670 01/30/20 06:53 PM
Joined: Jun 2003
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eljefino Offline
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That's pretty weird. I'd get before and after pics and email phillips- they may hook you up with a replacement. They don't make junk.

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